CVE-2021-47753

9.8 CRITICAL
Published: January 15, 2026 Modified: January 23, 2026
View on NVD

Description

phpKF CMS 3.00 Beta y6 contains an unauthenticated file upload vulnerability that allows remote attackers to execute arbitrary code by bypassing file extension checks. Attackers can upload a PHP file disguised as a PNG, rename it, and execute system commands through a crafted web shell parameter.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://www.exploit-db.com/exploits/50610
Source: disclosure@vulncheck.com
Exploit Third Party Advisory
https://www.phpkf.com/
Source: disclosure@vulncheck.com
Product
https://www.phpkf.com/indirme.php
Source: disclosure@vulncheck.com
Product
https://www.exploit-db.com/exploits/50610
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit Third Party Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
9.8 / 10.0
EPSS (Exploit Probability)
0.3%
48th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

phpkf